Screwcapping device with torque limiting magnetic clutch
AssigneeFederal Manufacturing Co.
InventorFrank M. Johanek
Life of this patent
Estimating the term…
Abstract
A clutch adapted for use in a screwcapping device to apply a preselected amount of torque to the driven component having a pair of axially aligned circular cylinders of equal diameter each having a generally smooth engaging surface facing the other clutch cylinder. Each of the cylinders has cavities in the rear side for containing magnets. The magnets are secured in the cavities by means of a cured polymeric resin. The maximum torque provided by the clutch is controlled by using removable spacer disks of varying thicknesses and having a diameter equal to that of the cylinders positioned between the engaging surfaces. The spacer may have a slot extending from the radius to the periphery adapted to be positioned on a central spindle passing through the cylinders.
Claims13
A clutch including a driving component and a driven component adapted for use in a screwcapping device to apply a preselected amount of torque to the driven component thereof comprising
- a pair of axially aligned circular cylinders of equal diameter each having a generally smooth engaging surface facing the other clutch cylinder of said pair,
- said pair of cylinders comprising a driving cylinder and a driven cylinder,
- means to rotate the driving cylinder about its axis,
- each of said cylinders having a plurality of cavities therein radially spaced around the axis thereof, said cavities containing permanent magnets,
- means securing said magnets in said cavities, and,
- a removable non-magnetic spacer disk of a diameter approximately equal to that of said cylinders positioned between and in frictional contact with the engaging surfaces thereof.
A clutch adapted for use in a screwcapping device to apply a preselected amount of torque to a driven component thereof comprising
- a pair of axially aligned circular cylinders of equal diameter each having a generally smooth engaging surface facing the other cylinder of said pair,
- said pair of cylinders comprising a driving cylinder and a driven cylinder,
- means to rotate the driving cylinder about its axis,
- each of said cylinders having a plurality of cavities in a side thereof opposite said engaging surface, said cavities being spaced radially around the axis of said cylinders, said cavities containing magnets, the north poles of the magnets in one of said cylinder facing the engaging surface thereof and the south poles of each of the magnets in the other cylinder face the engaging surface thereof,
- means securing said magnets in said cavities, and,
- a removable non-magnetic spacer disk of a diameter slightly less than that of said cylinders positioned between the engaging surfaces thereof, said disk covering the majority of the surface area of the engaging surfaces of said cylinders and being in frictional contact with the engaging surface of each of said cylinders.
Dependencies are inferred from the claim text.